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block/io_uring: implements interfaces for io_uring

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Aborts when sqe fails to be set as sqes cannot be returned to the
ring. Adds slow path for short reads for older kernels

Signed-off-by: Aarushi Mehta <mehta.aaru20@gmail.com>
Acked-by: Stefano Garzarella <sgarzare@redhat.com>
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
Message-id: 20200120141858.587874-5-stefanha@redhat.com
Message-Id: <20200120141858.587874-5-stefanha@redhat.com>
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
This commit is contained in:
Aarushi Mehta 2020-01-20 14:18:47 +00:00 • committed by Stefan Hajnoczi
parent 4c34ee366d
commit 6663a0a337
5 changed files with 439 additions and 1 deletions
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16
include/block/aio.h
View file

@ -49,6 +49,7 @@ typedef void IOHandler(void *opaque);
struct Coroutine;
struct ThreadPool;
struct LinuxAioState;
struct LuringState;
struct AioContext {
GSource source;
@ -117,11 +118,19 @@ struct AioContext {
struct ThreadPool *thread_pool;
#ifdef CONFIG_LINUX_AIO
/* State for native Linux AIO. Uses aio_context_acquire/release for
/*
* State for native Linux AIO. Uses aio_context_acquire/release for
* locking.
*/
struct LinuxAioState *linux_aio;
#endif
#ifdef CONFIG_LINUX_IO_URING
/*
* State for Linux io_uring. Uses aio_context_acquire/release for
* locking.
*/
struct LuringState *linux_io_uring;
#endif
/* TimerLists for calling timers - one per clock type. Has its own
* locking.
@ -386,6 +395,11 @@ struct LinuxAioState *aio_setup_linux_aio(AioContext *ctx, Error **errp);
/* Return the LinuxAioState bound to this AioContext */
struct LinuxAioState *aio_get_linux_aio(AioContext *ctx);
/* Setup the LuringState bound to this AioContext */
struct LuringState *aio_setup_linux_io_uring(AioContext *ctx, Error **errp);
/* Return the LuringState bound to this AioContext */
struct LuringState *aio_get_linux_io_uring(AioContext *ctx);
/**
* aio_timer_new_with_attrs:
* @ctx: the aio context